[ms-inline asm] Emit the (new) inline asm Non-Standard Dialect attribute.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163181 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 01acce8..0699857 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -2894,8 +2894,19 @@
 call void asm alignstack "eieio", ""()
 </pre>
 
-<p>If both keywords appear the '<tt>sideeffect</tt>' keyword must come
-   first.</p>
+<p>Inline asms also support using non-standard assembly dialects.  The standard
+   dialect is ATT, which is assumed when the '<tt>nsdialect</tt>' keyword is not
+   present.  When the '<tt>nsdialect</tt>' keyword is present, the dialect is
+   assumed to be Intel.  Currently, ATT and Intel are the only supported
+   dialects.  An example is:</p>
+
+<pre class="doc_code">
+call void asm nsdialect "eieio", ""()
+</pre>
+
+<p>If multiple keywords appear the '<tt>sideeffect</tt>' keyword must come
+   first, the '<tt>alignstack</tt>' keyword second and the
+   '<tt>nsdialect</tt>' keyword last.</p>
 
 <!--
 <p>TODO: The format of the asm and constraints string still need to be